kfree_rcu_mightsleep(9)

💅 kfree_rcu_mightsleep 💅

okay so this page lives in the Kernel API Manual, section 9 (that's the kernel API girlies, iykyk) 🎀

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✨ NAME ✨

kfree_rcu_mightsleep — literally kfree an object after a grace period. that's it, that's the vibe 💖

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🦋 SYNOPSIS 🦋

kfree_rcu_mightsleep (ptr );

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🌸 ARGUMENTS 🌸

• ptr — pointer to kfree for single-argument invocations. bestie it's just a pointer, one singular argument, that's the whole thing 🫶

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🔥 DESCRIPTION 🔥

ok so when we're talking about the head-less variant, only ONE argument gets passed, and it's just a pointer that has to be freed after a grace period. so the semantic is literally:

kfree_rcu_mightsleep(ptr);

where ptr is the pointer to be freed by kvfree. no cap 💅

⚠️ please note, bestie: the head-less way of freeing is permitted to be used from a context that has to follow the might_sleep annotation. otherwise, please switch and embed the rcu_head structure within the type of ptr. 💀 don't skip this, fr fr

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🌈 SEE ALSO 🌈

yesss the reference list, and it is LONG, so buckle up gorgeous 😭✨

The kernel file ./include/linux/rcupdate.h, plus:

• same_state_synchronize_rcu(9)
• cond_resched_tasks_rcu_qs(9)
• rcu_softirq_qs_periodic(9)
• RCU_LOCKDEP_WARN(9)
• lockdep_assert_in_rcu_read_lock(9)
• lockdep_assert_in_rcu_read_lock_bh(9)
• lockdep_assert_in_rcu_read_lock_sched(9)
• lockdep_assert_in_rcu_reader(9)
• unrcu_pointer(9)
• RCU_INITIALIZER(9)
• rcu_assign_pointer(9)
• rcu_replace_pointer(9)
• rcu_access_pointer(9)
• rcu_dereference_check(9)
• rcu_dereference_bh_check(9)
• rcu_dereference_sched_check(9)
• rcu_dereference_all_check(9)
• rcu_dereference_protected(9)
• rcu_dereference(9)
• rcu_dereference_bh(9)
• rcu_dereference_sched(9)
• rcu_dereference_all(9)
• rcu_pointer_handoff(9)
• rcu_read_lock(9)
• rcu_read_unlock(9)
• rcu_read_lock_bh(9)
• rcu_read_unlock_bh(9)
• rcu_read_lock_sched(9)
• rcu_read_unlock_sched(9)
• RCU_INIT_POINTER(9)
• RCU_POINTER_INITIALIZER(9)
• kfree_rcu(9)
• kfree_rcu_nolock(9)
• rcu_head_init(9)
• rcu_head_after_call_rcu(9)

like, she knows EVERYONE. main character energy fr 👑🦋

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and that's the whole page, babe 💜 this cutie came from ./include/linux and it's dated October 2026 — slay, see you in the group chat ✨🎀🫶